基于I/O受限进程识别的虚拟处理器调度机制

王强 1; 董小社 1; 王恩东 2; 朱正东 1

doi:10.7652/xjtuxb201504009

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基于I/O受限进程识别的虚拟处理器调度机制

更新时间：2025-07-09

- 基于I/O受限进程识别的虚拟处理器调度机制
- A Virtual CPU Scheduling Mechanism Based on I/O-Awareness
- 西安交通大学学报 2015年49卷第4期页码：53-60
- 作者机构：
  
  西安交通大学电子信息与工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2014-08-14。作者简介: 王强(1989—),男,硕士生;朱正东(通信作者),男,高级工程师。基金项目: 国家高技术研究发展计划资助项目(2008AA01A202,2012AA01A306);国家自然科学基金资助项目(61173039);国家青年自然科学基金资助项目(61202041)
- DOI：10.7652/xjtuxb201504009
  中图分类号： TP333
- 网络首发：2015-04-10，
  
  纸质出版：2015
- 稿件说明：
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王强 1, 董小社 1, 王恩东 2, 等. 基于I/O受限进程识别的虚拟处理器调度机制[J]. 西安交通大学学报, 2015,49(4):53-60.

A Virtual CPU Scheduling Mechanism Based on I/O-Awareness[J]. 2015, 49(4): 53-60.
王强 1, 董小社 1, 王恩东 2, 等. 基于I/O受限进程识别的虚拟处理器调度机制[J]. 西安交通大学学报, 2015,49(4):53-60. DOI： 10.7652/xjtuxb201504009.

A Virtual CPU Scheduling Mechanism Based on I/O-Awareness[J]. 2015, 49(4): 53-60. DOI： 10.7652/xjtuxb201504009.

摘要

针对多核平台的虚拟化环境中客户机与虚拟机管理器(virtual machine monitor

VMM)之间语义缝隙造成客户机I/O性能下降的问题

提出了一种基于I/O受限进程识别的虚拟处理器(virtual CPU

vCPU)调度机制。该机制在客户机内部利用推断技术识别I/O受限进程

通过客户机与VMM的协作实现I/O事件与I/O受限进程的关联

利用保证客户机之间公平性的虚拟对称多核处理器(virtual symmetric multi-core processor

vSMP)Internal调度算法

优先调度与I/O事件关联的I/O受限进程所在的vCPU来桥接客户机与VMM之间的语义缝隙

提高拥有vSMP的客户机中I/O负载性能。测试结果表明

相比于KVM虚拟化环境的CFS调度机制

该机制可以在保证客户机CPU公平性的前提下

有效提升运行混合负载的vSMP客户机中I/O负载性能

同时只增加较小的客户机额外开销

可以应用在负载多样性和不可预测性的虚拟桌面和云计算环境中。

Abstract

A novel I/O-aware virtual CPU(vCPU)scheduling mechanism in virtualized environments based on multi-core platform is proposed to eliminate the semantic gap between guest and virtual machine monitor(VMM)that dramatically degrades the performance of I/O-bound workloads in virtual symmetric multi-core processor(vSMP)virtual machine(VM). Inference techniques are used to identify the I/O-bound tasks

and the I/O-bound tasks and I/O events are correlated through the coordination between the guest operating system and VMM. Then the correlation information is used to bridge the semantic gap by a vSMP Internal algorithm so that a vCPU with I/O-bound task can selectively be scheduled to handle its incoming events promptly with ensured fairness among VMs. Extensive evaluations and comparisons with the CFS scheduler used by the KVM virtual machine monitor show that the proposed mechanism significantly improves I/O performance of vSMP VMs with ensured CPU fairness

and little overhead is introduced to guest. Therefore

the proposed mechanism is widely applicable in such environments with unpredictable and varying workloads as virtual desktop and cloud computing.

关键词

Keywords

references

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